IXP2400 Intel, IXP2400 Datasheet - Page 106

• Manufacturer Part Number: IXP2400
• Manufacturer: Intel

Specifications of IXP2400

• Operating Supply Voltage (typ): 1.3/1.5/2.5/3.3V
• Mounting: Surface Mount
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Not Compliant

Intel
106
Figure 16. QDR Load Circuit
Table 49. QDR and QDRII Signal Timing Parameters
®
IXP2400 Network Processor
1. If reference K clock any given pins, including data and controls, the maximum skew is ±300 psec.
2. The setup time is measured before the rising edge of the clock; when the measurements for Tsu are prefaced by a minus sym-
Figure 17
delay the input clock appropriately to acheive the required setup and hold time. For example, for
QDR at 100 MHz, delay the input clock by 2.1 ns compared to data. The clock will be shifted by
2.5 ns by internal DLL and hence strobe for the data at 4.6 ns.
Tcycle
Tvalmin
Tvalmax
Tval_a_
min
Tval_a_
max
Tsu
Th
Tjt
Symbol
bol (“-”), the data is actually after the rising edge of the clock. When the measurements for Tsu are prefaced by a plus symbol
(“+”), the data is actually before the rising edge of the clock.
The setup time is measured with 1V/ns input slew rate.
—
—
illustrates the timing goals for the IXP2400 QDRII interface. For QDR, it is necessary to
Clock cycle time
Tval clock to data
output valid (K/K#)
Clock to R/W
control output
valid and address
Tsu
Th (hold time)
Clock
cycle-to-cycle jitter
C/C# duty cycle
K/K# duty cycle
Parameter
2
(setup time)
1
Intel
IXP2400
Network
Processor
psec
0.85
0.85
1.80
®
Min
(ns)
100
5.0
2.4
2.4
—
—
—
(200 MHz)
QDRII
-0.60
Max
0.85
0.85
(ns)
2.6
2.6
—
—
—
—
—
ZQ[1]
ZQ[0]
DO
VREF
psec
1.25
1.25
2.35
Min
(ns)
150
6.6
3.2
3.2
QDR/QDRII
—
—
—
(150 MHz)
Rz = 50
VCC1.5/2
-0.95
Max
1.25
1.25
(ns)
3.4
3.4
—
—
—
—
—
Rz = 50
Ω
VCC1.5
psec
1.25
1.25
3.65
3.65
(ns)
Ω
Min
150
7.5
2.5
QDR/QDRII
—
—
—
(133 MHz)
Rz = 50
Max
1.25
1.25
3.85
3.85
(ns)
-1.0
—
—
—
—
—
Ω
psec
10.0
1.95
1.95
(ns)
Min
200
2.8
4.9
4.9
QDR/QDRII
—
—
—
(100 MHz)
Datasheet
B0058-01
Max
1.95
1.95
(ns)
-1.7
5.1
5.1
—
—
—
—
—